Devitrification behavior and glass-forming ability of Cu–Zr–Ag alloys
Devitrification behavior and glass-forming ability of Cu–Zr–Ag alloys
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DOI：
10.1016/j.msea.2007.02.039
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发表时间：
2007-09
期刊：
影响因子：
6.4
通讯作者：
D. V. Louzguine-Luzgin;G. Xie;Wei Zhang;A. Inoue
中科院分区：
文献类型：
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作者：
D. V. Louzguine-Luzgin;G. Xie;Wei Zhang;A. Inoue
本文研究了Ag对Cu-Zr非晶合金玻璃形成能力和加热失透行为的影响。采用X射线衍射、透射电镜、差示扫描量热法和等温量热法研究了Cu 45 Zr 45 Ag 10和Cu 35 Zr 45 Ag 20非晶合金在加热过程中的晶化动力学和结构变化。基于所获得的结果，可以假设，通过添加Ag的Cu-Zr合金的玻璃形成能力的改善与特定的结晶机制和Cu 45 Zr 45 Ag 10三元合金的比二元Cu 55 Zr 45对应物更高的约化玻璃转变温度有关。如在本工作中观察到的，发现Cu-Zr-Ag合金的结晶导致样品的苦化，并且应该避免，因为这些合金被认为是用作结构材料。Cu_（35）Zr_（45）Ag_（20）合金在退火过程中出现了亚微米级的相分离。
This paper presents an influence of Ag addition on the glass-forming ability and devitrification behavior of Cu–Zr glassy alloys on heating. The crystallization kinetics and structure changes in Cu45Zr45Ag10and Cu35Zr45Ag20glassy alloys on heating were studied by X-ray diffraction, transmission electron microscopy, differential scanning and isothermal calorimetry methods. Based on the results obtained one can assume that the improvement of the glass-forming ability of the Cu–Zr alloys by the addition of Ag is connected with a particular crystallization mechanism and a higher reduced glass-transition temperature of the Cu45Zr45Ag10ternary alloy compared to the binary Cu55Zr45counterpart. As observed in the present work crystallization of the Cu–Zr–Ag alloys is found to cause embitterment of the samples and should be avoided as these alloys are considered to be used as structural materials. The Cu35Zr45Ag20alloy shows possible submicron-scale phase separation upon annealing.